689826261 has 8 divisors (see below), whose sum is σ = 944627104. Its totient is φ = 447454800.

The previous prime is 689826259. The next prime is 689826283. The reversal of 689826261 is 162628986.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689826261 - 2¹ = 689826259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689826261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689826211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3107215 + ... + 3107436.

It is an arithmetic number, because the mean of its divisors is an integer number (118078388).

Almost surely, 2^689826261 is an apocalyptic number.

It is an amenable number.

689826261 is a deficient number, since it is larger than the sum of its proper divisors (254800843).

689826261 is a wasteful number, since it uses less digits than its factorization.

689826261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6214691.

The product of its digits is 497664, while the sum is 48.

The square root of 689826261 is about 26264.5437995789. The cubic root of 689826261 is about 883.5814191358.

The spelling of 689826261 in words is "six hundred eighty-nine million, eight hundred twenty-six thousand, two hundred sixty-one".